Selenosulfonation of acetylenes: preparation of novel .beta.-(phenylseleno)vinyl sulfones and their conversion to acetylenic and .beta.-functionalized sulfones
Enantiomerically enriched β-keto sulfoxides are obtainable by an alternative method to the classical reaction of the enantiomerically pure α-sulfinyl anion with esters or by Andersen's synthesis, through Sharpless modified kinetic resolution of racemic β-keto sulfoxides. High e.e.s are achieved by combining asymmetric oxidation and kinetic resolution using furylhydroperoxides as oxidants.